1. Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510280, P.R. China
2. Department of Cardiology, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
3. Fujian Key Laboratory of Cardiovascular Disease, Fujian Provincial Hospital, Fujian Medical University, Fuzhou, Fujian 350001, P.R. China